Chronic unpredictable mild stress alters an anxiety-related defensive response, Fos immunoreactivity and hippocampal adult neurogenesis

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dc.contributor.authorAndrade, José Simões de [UNIFESP]
dc.contributor.authorCéspedes, Isabel Cristina [UNIFESP]
dc.contributor.authorAbrão, Renata Oliveira [UNIFESP]
dc.contributor.authorSantos, Thays Brenner dos [UNIFESP]
dc.contributor.authorDiniz, Leila [UNIFESP]
dc.contributor.authorBritto, Luiz Roberto Giorgetti de
dc.contributor.authorSpadari-Bratfisch, Regina Celia [UNIFESP]
dc.contributor.authorOrtolani, Daniela [UNIFESP]
dc.contributor.authorMelo-Thomas, Liana [UNIFESP]
dc.contributor.authorSilva, Regina Cláudia Barbosa da [UNIFESP]
dc.contributor.authorViana, Milena de Barros [UNIFESP]
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2016-01-24T14:32:04Z
dc.date.available2016-01-24T14:32:04Z
dc.date.issued2013-08-01
dc.description.abstractPrevious results show that elevated T-maze (ETM) avoidance responses are facilitated by acute restraint. Escape, on the other hand, was unaltered. To examine if the magnitude of the stressor is an important factor influencing these results, we investigated the effects of unpredictable chronic mild stress (UCMS) on ETM avoidance and escape measurements. Analysis of Fos protein immunoreactivity (Fos-ir) was used to map areas activated by stress exposure in response to ETM avoidance and escape performance. Additionally, the effects of the UCMS protocol on the number of cells expressing the marker of migrating neuroblasts doublecortin (DCX) in the hippocampus were investigated. Corticosterone serum levels were also measured. Results showed that UCMS facilitates ETM avoidance, not altering escape. in unstressed animals, avoidance performance increases Fos-ir in the cingulate cortex, hippocampus (dentate gyrus) and basomedial amygdala, and escape increases Fos-ir in the dorsolateral periaqueductal gray and locus ceruleus. in stressed animals submitted to ETM avoidance, increases in Fos-ir were observed in the cingulate cortex, ventrolateral septum, hippocampus, hypothalamus, amygdala, dorsal and median raphe nuclei. in stressed animals submitted to ETM escape, increases in Fos-ir were observed in the cingulate cortex, periaqueductal gray and locus ceruleus. Also, UCMS exposure decreased the number of DCX-positive cells in the dorsal and ventral hippocampus and increased corticosterone serum levels. These data suggest that the anxiogenic effects of UCMS are related to the activation of specific neurobiological circuits that modulate anxiety and confirm that this stress protocol activates the hypothalamus-pituitary-adrenal axis and decreases hippocampal adult neurogenesis. (C) 2013 Elsevier B.V. All rights reserved.en
dc.description.affiliationFed Univ São Paulo UNIFESP, Dept Biosci, Santos, SP, Brazil
dc.description.affiliationUniv São Paulo, Inst Biomed Sci, Dept Physiol & Biophys, São Paulo, Brazil
dc.description.affiliationUnifespFed Univ São Paulo UNIFESP, Dept Biosci, Santos, SP, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIDFAPESP: 2011/17471-0
dc.description.sponsorshipIDFAPESP: 2011/01409-4
dc.format.extent81-90
dc.identifierhttps://dx.doi.org/10.1016/j.bbr.2013.04.031
dc.identifier.citationBehavioural Brain Research. Amsterdam: Elsevier B.V., v. 250, p. 81-90, 2013.
dc.identifier.doi10.1016/j.bbr.2013.04.031
dc.identifier.issn0166-4328
dc.identifier.urihttps://repositorio.unifesp.br/handle/11600/36595
dc.identifier.wosWOS:000321880400012
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofBehavioural Brain Research
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.rights.licensehttps://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.subjectUnpredictable chronic mild stressen
dc.subjectElevated T-mazeen
dc.subjectFos immunoreactivityen
dc.subjectNeurogenesisen
dc.subjectCorticosteroneen
dc.titleChronic unpredictable mild stress alters an anxiety-related defensive response, Fos immunoreactivity and hippocampal adult neurogenesisen
dc.typeinfo:eu-repo/semantics/article
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